MEASUREMENT

I recently had this debate about measurement and decoherence with one of my physics professors. The issue came up when I was trying to explain (pretty pathetically I must say...) what I did in my research in quantum information. It turned out I used a phrase that he took objection to. It was the following: "Decoherence is the phenomenon of making unwanted measurements". Immediately he said I must back off because Decoherence is inevitable and unintentional whereas measurement is intentional (my italics). I replied with the Dirac-Feynman definition model of physics which says that whatever we define in Physics must not contain us or any human emotion because nature does not give a hoot about what we think we are doing. To be more precise, I will quote a line from Dirac's book:

"This is the test quote"